"Back to the Future 1" is actually making a fuss about this "grandfather's paradox". Marty went back in time, when his parents were about the same age as him, and met his parents. His mother had a good impression of him, but missed the chance that the two parents should meet, which made some of their brothers and sisters become unhealthy, so Marty tried his best to promote the love of his parents, and with the help of Dr. Crazy Next, back to the era in which he lived. This kind of story is interesting when you think about it. In the words of Sister Pomegranate: You actually fell in love with your mother, my God! Such a rebellious and conscientious thing is really...exciting!
However, due to the existence of paradoxes, the subject of time travel is inevitably plagued by unsolvable problems. For example, it is impossible for people who return to the past to have an impact on history, and it is impossible for such an impact to not change the development of future generations. Then how does this impact work, and in what range, is a maddening one. Also, if a person goes back a little bit earlier, and waits until the moment of the first departure to return to the same moment before, and so on, this will fall into an infinite loop, and there will be countless existences in the world for a period of time. Is this possible for the same person? And this is just what I thought of after seeing some plots of the film. In addition, there are many, many problems that make people collapse.
It should be said that this movie does a good job in this regard, because it can be seen that the screenwriter and director are trying to round up the story and make it more interesting. That's it. After all, the mission of the film is not to explore the feasibility and paradox of time travel. Many sections now seem to be vulgar, such as the crazy doctors who are not scribbles, such as using the knowledge of their own time to fool the people of the past, etc., but these must be very interesting things for the audience when the movie is released. Knowing that this is a 1985 movie after all.
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